Stop-motion fob looms



Patented Aug. 19, 1919.

5 SHEETSSHEET l.

J. STUER STOP MOTION FOR LOOMS. APPLICATION FILED NOV-23.1915.

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anwwvliob (5111166671667? attomwv J. STUER.

STOP MOTION FOR LOOMS.

APPLICATION FILED NOV. 23. 1915.

1 ,3 1 3, 75 5, Patented 19, 1915).

5 SH -SHEET 2.

M aFxf/ma attom e4 J. STUER.

STOP MOTION FOR LOOMS.

APPLICATION FILED NOV. 23. 1915.

1,3 1 3, 75 5 Patented Aug. 19, 1919.

. SHEET 3.

5 SHEETS- Jules 8 Z'uei: wi tm 00% J. STUER.

STOP MOTION FOR LUOMS. APPLICATION FILED NOV. 23, m5.

1 3 1 3, 75 5 Patented Aug. 19, 1919.

5 SHEETSSHEET 4.

Svwwtoz Jib Z6 6 S Z'u en a/vflmeooeo J. STUER.

STOP MOTION FOR LOOMS.

APFLiCAHON man NOV. 23. 1915,

.Putenlvd Aug. 19, 1919.

5, Q 1 9 m 1 MW 1 J v 3 In Win moon album per lever rides JULES STUEB, OF METHUEN, MASSACHUSETTS.

STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented Aug. 19, 1919.

Application filed November 23, 1915. Serial No. 63,056.

To all whom. it may concern:

Be it known that l, JULES STUER, a citizen of the United States, residing at Methuen, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Stop -Motions for Looms. of which the following is a speci fication.

This invention relates to devices for operating the stopping mechanism of a loom upon the breakage of a warp thread and has for its principal object to provide an electromechanical system by means of which excessive sparking between stationary and movable parts of the circuit and wastage of current is obviated.

My invention also has for an object to provide an electric circuit broken at all times except when a heddle frame reaches a lowermost position, that is, the position where the heddles are raised with relation to their associated heddle frame by the warp threads.

A further object of the invention is to provide electro-mechanical means by means of which the tripper lever carried by the lay will move in a path that will carry it past the shipper actuating mechanism so that the latter will remain ino erative.

A further object o the invention is to provide a bracket to which a portion of the shipper mechanism is attached with an extending curved finger upon which the tripwhen the electromechanical means is rendered active through the breaking of a warp thread.

This invention also provides a pair of brackets forming the terminals of an electric circuit and having portions adjustable and slidably mounted within portions of a heddle frame, the latter carrying means for bridging the distance between the brackets upon the frame reaching its lowermost position.

In my system, I also make use of an electromagnet, the armature of which forms a portion of the circuit in which the magnets are arranged so that upon energization of the magnets and the attraction ofthe armature, the circuit will be broken and will remain broken until restored by means hereinafter described.

The invention accordingly consists in the features of construction, combination of elements, and arrangement of parts, which will be exemplified in the construction hereinafter set forth and the scope of the application of which will he indicated in the followin claims:

Referring to the drawings:

Figure 1 is a vertical section through a well known form of loom showing my invention applied thereto.

Fig. 2 is an enlarged side elevation of a portion of my invention for operating the shipping mec ianism.

Fig. 3 is a similar view showing the parts actuated.

Fig. 4 is a bottom plan view of Fig. 2.

Fig. 5 is a view similar to Fig. 3 showing the reverse side.

Fig. 6 is a detail section showing the associations between the magnet armature and the lever.

Fig. 7 is a diagrammatic view of the system.

Fig. 8 is a detail view of the heddle frame and one of the brackets associated therewith.

ig. 9 is a detail view showing the heddle frames and one form of the bracket on the loom frame. through which bracket electrical conne-tion is made in the manner described below.

Fig. 10 is a detail view of one of the heddles.

Fig. 11 is a view similar to Fig. 8 showing a slight modification.

Fig. 12 is a' perspective view of one of the brackets.

Referring more particularly to Figs. 7 and 8, the heddle frame 1 has its side bars 2 and 3 provided with vertical slots 4 and Arranged in the upper portion of the slots are spring contacts 6 and 7, the former being electrically connected by means of a wire 8 to a bar 9 having interfitting relation with a second bar 10 also in electrical connection with the spring contact 7 by means of the wire 11.

The bars 9 and 10 are secured to the bars 2 and? and are arranged transversely of the frame. The bar 9 is insulated throughout its length from the bar 10 by means of the insulating material 12.

Referring to Fig. 10, it will be seen that the upper longitudinal edge of the bar 9 projeets an appreciable extent above the bar 10, while the sides of the bar 10 are 8 used a slight distance from the vertical wa s 13 of the slots 14 formed in the upper portion of the heddle.

i The protruding portion of the bar'9 18 a1? movable within a slot of the heddle frame so I ranged to engage the inclined walls 15 of the slots. These inclined walls 15 terminate in a circular depression 16 in which seats the edge of the bar 9 when the hcddle reaches its final position upon breakage of the warp thread. a

From this arrangement, it will be seen that initially upon breaking of a Warp thread, that particular heddle gravitates vertically until the inclined wall strikes the bar 9, which causes lateral movement of the heddle for throwing one of the vertical walls into close contact with'a side of the bar 10, thus it will be seen that the heddle when in a lowermost position bridges the distance between the bars so as to bring the contact 6 into electrical association with the contact 7.

In Fig. l I have shown a bracket B, and having pivotal connection therewith an arm I) projecting through two heddle frames. A

bracket B of the same general type is shown in Fig. 9, the arm 6 extending however at an angle with reference to the body of the bracket. The form of the bracket varies slightly according'to the relative position of the frames, and in Figs. 7, 8 and 12 the pivoted arm is in the plane of the body of the bracket. In the following description of this feature of the construction, reference is made more particularly to the figures last named.

Secured to one vertical side of the loom frame is a bracket 17 while a similar bracket 18 is connected to but insulated from the opposite side of the loom.

Each of these brackets as clearly shown in Fig. 12 comprises a base 19 formed with a guide Way 20 slidably receivin one limb 21 of an adjustable member 22. This 'mem ber 21 has a slot 23 permitting adjustments by the nut 24. This member or arm 22 is as to contact with the spring when the frame reaches its lowermost position.

In the drawings, I have illustrated a portion of the well known form of shipping mechanism comprising the rock shaft or knock-ofi' shaft 25 mounted in bearings 26 depending from the under surface of the breast beam 27.. One end of the knock-ofi' shaft forming a part of the stop motion of the Knowles loom carries an offset member actuating the brake rod of that loom,

of the present invention, being well and in common use.

said brake rod carrying an offset member engaging lever 28 for knocking off shipping shaft 57 This construction forms no part known The knock ofi shaft 25 has connected to it a curved arm 29 that has one end portion normally resting against the lug 3O projecting laterally from a second arm'3l. Thisarm 31 is pivotally connected a bracket 32 secured to the breast beamopposite the race beam 37 and provided with an extending curved finger 33. Resting upon the upper curved surface 34 of the finger is the tripper lever 35 pivotally mounted to the under surface of the race beam 37 of the lay 38.

The curved finger 33 holds the trigger lever 35 from gravitating to its lowermost position and also guides the same into engagement with the free extremity of the second arm 31. Vith those parts just described, cooperatcs my clcctro-mechanical device for actuating the shipper lever mechanism upon breakage of a warp thread.

This device comprises a lever 39 curving in opposite directions from a central point. The central portion of the lever is pivotally connected to the. bracket by means of the pin 40. That portion of the lever extending from the pin 40 toward the lay has a weight greater than that portion shown extending toward the breast beam so that when the same is free to move, it will move toward a vertical position. hen all of the warp threads are continuous, that portion of the lever adjacent the race beam and designated by the numeral 41 finger 33 so that during the oscillator movement of the lay, the portion 41 wil cause the tripper lever 35 to pass over the arm 31 with the result that the shipper mechanism remains in a neutral position.

Immediately the lever moved toward a vertical position, the tripper lever 35 is free to ride upon the finger 33 so as to engage the lever 31 upon movement of the lay toward the breast beam. When this action takes place, the lever 31 is rotated upon its pivot and through the action of the stud 30 causes the arm 29 to be depressed.

, Upon depression of the arm 29, the rock shaft 25 is given a partial rotation for actuating the stopping mechanism. For retaining the lever 39 in arposition to prevent engagement between the tripper lever 35 and the arm 31, I provide electro-magnets 42 the armature 43 of which is provided with an extension 44 arranged in the path of movement of the extremity -45 of'the lever 39. Upon attraction of the armature 43 toward the magnets, the extension 44 will move away from the extremity 45v for allowing gravitation of the portion41-of the lever, thus allowing the tri per lever 35 tocome into, engagement wit the arm- 31 for accomplishing the result heretofore set forth.

The electro-magnets 42am arranged in a circuit 46 that includes a source of current will extend above the 47. This circuit comprises a conductor 48 that connects one pole of the source of current- :17 to a bolt 48* mounted in the loom frame but insulated therefrom and supporting my improved mechanism. This bolt 48 is electrically connected to one extermity of the coils of the electro-magnets while the remaining extremity is electrically connected to a second bolt 48 also insulated from the movable frame and coiiperating with the bolt 48* to support my improved mechanism.

A second conductor connects the bolt 48 to the bracket 18 from whence the current passes by way of the spring contact 6 through the bars 9 and 10 to the brackets 17, that is in electrical engagement with the metallic frame of the loom. As the lever 39 is supported by the frame and normally bears upon the extension 44 of the armature. current will pass from the loom frame through the lever 39 to the armature 43, the latter being electrically connected to the magnet frame 49, by means of a conductor 49", and insulating from the loom frame by means of magnet frame 49 attached to and insulated from the bracket The magnet frame 49 is electrically connected by means of a conductor to a brush 51 bearing upon a commutator 51 mounted upon one of the shafts of the loom that makes one complete revolution when a heddle frame has passed from its uppermost position to its lowermost position and back to its original position, said commutator 51 moving so as to make and break the circuit at each time the heddle frame has passed from its uppermost position to its lowermost position.

For completing the circuit I provide a second brush 50 arranged parallel to the brush 51 and connected by means of a conductor 49 to the other pole of a source of current.

From this arrangement, it will be seen that the circuit is only closed when the heddle frame is in its lowermost position, that is to say, when the hcddles are held in an elevated position with relation to the frame by the warp threads. Upon breakage of a thread, that particular heddle will not be held up so that current will pass from the source of current through the bolt 48 to the coil of the electro-magnets, back to the bolt 48" from whence it passes to the bracket 18. From the bracket 18 the current passes through the spring contact 6 to the bar 9, from the bar 9 to the bar 10 through the released heddle from whence the current passes through the contact spring 7 to the bracket 17 to the loom frame.

In view of the fact-that the lever 39 is in electrical engagement with the loom frame and bears upon the extension of the armature, current Will pass through the lever to the armature and .to the magnet frame through the conductor 49", the circuit being completed from the-magnet frame to the source of current by means of the conductor 49, brushes 50 and 51 and commutator 51. Upon completion of the circuit, the magnets 42 are energized for attracting the rmature 43. This attracti n of the armaw through lug 30 tare 43 causes the end of the extension 44 to move away from the end of the lever 39 for allowing the latter to assume a position that will not prevent engagement between the tripper lever and the arm 31. y

The numeral 56 designates a leaf spring rigidly secured to the shipper shaft 57 and this leaf spring 56 cooperates with a lug 58 formed on the lever 39 at a point adjacent the electro-magnet so that upon the operation of the shipping mechanism by the instrumentalities previously mentioned the shaft 57 will be given a partial rotation and as a result the leaf spring 56 pressing downwardly upon the lug 58 will space the extremity of the lever 39 a distance from the extension 44 of the armature 43. Upon the spacing of the extension of the armature 43 away from the adjacent extremity of the lever 39, the continuity of the electric circuit at this point will be permanently broken until the operator resets the shipping mechanism, which causes the leaf spring 56 to mo ve away from the lug 58 for allowing the extremity of the lever 39 to regain its initial position.

The operation is set tail as follows:

When the loom is running, spring 56 is raised above element 58. The center of gravity of lever 39 is a little farther away from extremity 45 than the pin 40. In other words that ,portion of the lever extending from pin 40 toward extension 44 and co-acting therewith causes element 41 to be held up above arm 31. After the end breaks and before the loom stops, if the harness for the heddle where the break occurs, is up, it must. descend. hen the harness is down, this heddle will electrically connect bars 9 and 10. A vibration or sinking movement at times results from the uneven lifts of the harnesses where many harnesses go down together, causing certaln heddles to strike bars 9 and 10 without having any ends out. After these vibrations are over, the commutator 51 connects electrically with brushes 50 51, completing a circuit and causing magnet 42 to attract armature 43 and move extension 44 away from extremity 45. Lever 39 having a greater weight on the end 41 causes extremity 45 to raise above extension 44, breaking the circuit until the loom is again started, as explained below. The raising of extremity 45 causes 41 to lower and ex oses arm 31 to trip 35.

rom this time until the stopping of the loom the following takes place: Trip 35 in its oscillatory movement strikes arm 31 and depresses arm 29 causing the loom to stop. At the time trip 35 strikes arm 31 the commutator 51* has revolved so .far that there is no electrical connection with brushes 50 and 51. The loom in its stopping movement rotates partially, the

forth in greater deshipping shaft 57, which in consequence moves leaf sprin 56 down onto lug 58 and brings end 45 be ow extension 44, and low enough so there is no electrical connection between 45 and 44. The connection remains broken while the harness is down.

When the broken thread is repaired and the loom is starting, the shipping handle is moved in a direction opposite to that in which it moved'when stopping. The shipping shaft also rotates in an opposite direction and causes spring 5.6 to raise from lug 58, causing end 45 to press against extension 44, where it rested before the thread broke.

It will be observed that when spring 56 presses lug 58, it brings extremity 45 a little below extension 44; also that the break at 45 is only made when element 44 allows 45 to rise, after which element 44 returns to normal position until the loom stops. At the proper time, end portion 45 (beveled on the under side) is manually depressed and throws element 44 out of/ its path and to a position below element 44, the latter again assuming normal position.

Having described my invention, what is claimed is:

, 1. In a stop motion for looms, a rock shaft for actuating the shipper mechanism, a curved arm secured thereto, a second arm having a projection engaging said first mentioned arm, a bracket to which said second arm is pivoted and provided with a curved finger above which said second a'rm normally projects, a tripper lever carried by the lay of the loom and arranged to slide on said fingerso as to engage'said second arm, a balanced lever pivoted at a central point to said bracket and normally projecting above said second arm and normally holding said tripper lever out of engagement with said finger, an electro-magnet forholding said lever in cult therefor including the balanced lever, and warp controlled means for closing said circuit upon breakage of the warp threads.

2. In a stop motion for looms, a rock shaft for actuating the shipper mechanism, a

its normal position, a cir-' curved arm secured thereto, a second arm having a projection engaging said first mentioned arm, a bracket to which said second arm is pivoted and provided with a curved finger above which said second arm nor mally projects, a tripper lever carried by the lay of the loom and arranged to slide on said finger so as to engage said secondarin, a gravity operated device includinga lever pivoted at a central point to said bracket and normally pro ecting above said second arm and normally holding said tripper lever out of engagement with said fingers, an electro-magnet engaging one end of said leverfor holding the latter in its normal position, a circuit therefor including the gravity operated device, and warp controlled means for closing said circuit upon breakage of the warp threads.

3. In a stop motion for looms, a rock shaft for actuating the shipper mechanism, a

curved arm secured thereto, a second arm having a projection engaging said first mentioned arm, a bracket towhich said second arm is pivoted and provided with a curved finger above which said second arm normally projects, a tripper lever carried by the lay closing said circuit upon breakage of the and mechanical means for re- I warp threads, storing said lever to normal restoration of said first and tioned arms to normal position.

In testimony whereof I aflix my signature in presence of two witnesses.

J ULES STUER.

position upon second men- Witnesses:

JOSEPH HOLLINGS, Dr," "W STUER. 

